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I understand this is an old Post how did you go ? As i looking at doing something similar possibly I have a sunny island in Si8.0 setup in battery back up with Grid Connection (which has solar on the grid connect side ) Installed this about few years ago and never had time to finish off...

you said you have your pv on the a1 load side correct ? my Pv is currently on the grid input A2 side so twhat are the parameters to export as you mention manual start to start ? fyi i did try the manual off the a2 at evening the other day and turn a2 back on whenit was morning but straight away...

I dont have that much load on the sunny island as i have several loads off the sunnny island its Mainly power and lights and a two small a/c units combined only draw 2400w my heavy loads are grid side not on A1 1- Grid side Hot water running through green catch so it uses solar and off peak...

i guess i have to try and give it a go in the next week or so when i have some free time to reconfig etc, and i should look for the sma parametrs to save the current settings of the sd card and save that set it to 1, so when i change all my settings i have a back up of the original if need be...

Im hoping some feedback if that is ok please if some has knowlodge re below, really appreaciate it.. So im finally going to re config my Sma Sunny Ialand 8.0h parmeters using sunny remote control and just hoping any tips of things i need to be aware of when reconfig my setup is in earlier...

would this work for you ? https://www.catchpower.com.au/catch-solar-relay-1

Thaxs for the reply, I was actually thinking myself what you mentioned "I think GdRvPwr only applies when backfeed is not enabled. Changing it may not matter when GridFeed is enabled." Attached operaters manual for the sunny island 8.0h

"I save them for use when grid is down." that was the reason for the initial setup i have, but im not utilising the batteries at all so was thinking of at least running them for some period at night. specs below - Im running 4 rows of 24 x 2 volt 330ah/5h sealed gel battery with float voltage...

Was trying to find actual written technical specs on pv backfeed max through ac2 to grid the attached file states max pv on ac1 is 12000w but the problem here is my pv wont shut down when and will backfeed to grid so i need to confirm max wattage i can push out, thtas why i was only going to do...

tech docs say you can program freq limits for on/off relay ? inc voltage limits and thresholds etc